what is r times r?
is it 2r or something else?? I need help with math
- MICHAEL KLv 75 days ago
The answer would be r^2 because 2r is r + r.
- 6 days ago
It's r square = r^2.
- PuzzlingLv 76 days ago
This can be a confusing concept when you switch from numbers to variables. So let's go back to looking at concrete numbers and see if you can figure it out.
Let r = 5
2r = 10
So it makes sense that r *plus* r = 2r.
r + r = 2r
5 + 5 = 10
But when you are multiplying a number by itself, then you are *squaring* not adding.
r * r = r²
5 * 5 = 5² = 25
For example, if the size of a closet is 5 ft. x 5 ft. then its area is 25 sq. ft. You wouldn't add and say it is 10 ft. That's not even an area, it's just another length.
Multiplying a number by itself is the same as *squaring* so the result would be r².
r * r = r²
- sepiaLv 77 days ago
r times r equals r^2.
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- PinkgreenLv 77 days ago
Suppose r*r=2r is true for all real number, then
r*r-2r=0=>r(r-2)=0=>r=0 or r=2.
That means 2*2=2(2); 0*0=2(0) are true.
If r=3, then LHS=3*3=9, but RHS=2(3)=6. LHS=/=RHS
r*r=2r can't be true for any real number except r=0 or r=2. It
is a contradiction to the assumption
r*r=2r is not true, in general.
In fact r*r=r^2.
- PhilomelLv 71 week ago
R*R=R^2 (r squared)
- DavidLv 71 week ago
It is r squared = r^2
- SumDudeLv 71 week ago
When the heck will the government reopen schools ???
- Engr. RonaldLv 71 week ago
r * r = r^2 Answer
- KrishnamurthyLv 71 week ago
r times r equals r to the power 2.